IHG One Rewards. It's better to be a member. Join IHG One Rewards to unlock benefits that will immediately enhance your next stay. Welcome to the Holiday Inn Express hotel in Lake Oswego, Oregon. Comfort is our first priority at the Holiday Inn Express Portland South in beautiful Lake Oswego, Oregon. We are conveniently located near several Oregon attractions and corporate locations making our hotel the perfect place for both leisure and business travelers to stay and play.